Slip 2 - A) Create a Node.js Application that uses user defined Module to return the factorial of given number.

 Solution:

fact.js

var fact={  

  factorial: function(n)

{

    var f=1,i;

  for(i=1;i<=n;i++)

   {     f=f*i;

   }

  console.log('factorial of '+n+' is:'+f);}};

 module.exports=fact

app.js

var mymod=require('C:/Users/Public/node_prog/fact.js');

mymod.factorial(5);

Initiate app.js file :

C:\Users\Your Name>node app.js